[PATCH] build: Add --disable-manpages configure option

[Colin Walters <walters@verbum.org>]

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It's not enough to check for xsltproc - the system may not have the
docbook stylesheets installed.  This patch also allows builders to
override the generation/installation of manpages entirely; for
example, manpages are of no use for embedded systems, so it's better
to not even waste the power building them.
---
 configure.ac    |   10 ++++++++--
 man/Makefile.am |    4 ++--
 2 files changed, 10 insertions(+), 4 deletions(-)



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>From eb0f352dc35e5b4a75abd27f1877b37bd1d536c6 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Wed, 9 Jan 2013 19:35:05 -0500
Subject: [PATCH] build: Add --disable-manpages configure option

It's not enough to check for xsltproc - the system may not have the
docbook stylesheets installed.  This patch also allows builders to
override the generation/installation of manpages entirely; for
example, manpages are of no use for embedded systems, so it's better
to not even waste the power building them.

This is equivalent to the code in systemd and kmod's configure.ac.
---
 configure.ac    |   10 ++++++++--
 man/Makefile.am |    4 ++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0e6db86..273b9b8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -226,8 +226,14 @@ if test "x$HAVE_LIBUDEV" = xyes; then
 fi
 AM_CONDITIONAL(HAVE_LIBUDEV, [test "x$HAVE_LIBUDEV" = xyes])
 
-AC_PATH_PROG(XSLTPROC, xsltproc)
-AM_CONDITIONAL([HAVE_XSLTPROC], [test "x$XSLTPROC" != "x"])
+AC_ARG_ENABLE([manpages],
+        AS_HELP_STRING([--disable-manpages], [disable manpages @<:@default=enabled@:>@]),
+	[], enable_manpages=yes)
+AM_CONDITIONAL([BUILD_MANPAGES], [test "x$enable_manpages" = "xyes"])
+AC_PATH_PROG([XSLTPROC], [xsltproc], [no])
+AS_IF([test "x$XSLTPROC" = "xno" && test "x$enable_manpages" = "xyes"], [
+	AC_MSG_ERROR([xsltproc command not found, try ./configure --disable-manpages])
+])
 
 if test "x$INTEL" != "xno" -o "x$RADEON" != "xno" -o "x$NOUVEAU" != "xno" -o "x$OMAP" != "xno"; then
     # Check for atomic intrinsics
diff --git a/man/Makefile.am b/man/Makefile.am
index 32acd07..42c3616 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -22,7 +22,7 @@ CLEANFILES =
 EXTRA_DIST =
 man_MANS =
 
-if HAVE_XSLTPROC
+if BUILD_MANPAGES
 
 CLEANFILES += $(MANPAGES) $(MANPAGES_ALIASES)
 EXTRA_DIST += $(MANPAGES) $(MANPAGES_ALIASES) $(XML_FILES)
@@ -51,4 +51,4 @@ XSLTPROC_PROCESS_MAN = \
 %.7: %.xml
 	$(XSLTPROC_PROCESS_MAN)
 
-endif # HAVE_XSLTPROC
+endif # BUILD_MANPAGES
-- 
1.7.1


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